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Sony MD Walkman MZ-E90, Service Manual, Page: 7 / 42

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Sony MD Walkman MZ-E90 Service Manual Download Page 7

– 7 –

Note : This set can be disassemble according to the following sequence.

SECTION 3

DISASSEMBLY

3-1. LID ASSY, UPPER

3-2. HOLDER ASSY

Note : Follow the disassembly procedure in the numerical order given.

Set

Lid Assy, Upper

Holder Assy

Mechanism Deck

“Plate (L) Assy, Fulcrum ”,
“ Plate (R) Assy, Fulcrum” 

System Board

Service Assy, OP

SW Board,
Main Board

1

2

3

 screw(1.7),MI

4

 screw(1.7),MI

5

 lid assy, upper

1

 shaft

2

 shaft

3

 holder assy

Summary of Contents for MD Walkman MZ-E90

Page 1: ...w and Flutter Below measurable limit Outputs Headphones stereo mini jack maximum output level 5 mW 5 mW load impedance 16 ohm General Power requirements Nickel metal hydride rechargeable battery NH 14WM supplied One LR6 size AA battery not supplied Sony AC Power Adaptor AC E15L not supplied connected to the DC IN 1 5V jack Battery operation time Battery life Batteries Playback Ni MH Approx 21 hour...

Page 2: ...ductor when soldering or unsoldering Notes on chip component replacement Never reuse a disconnected chip component Notice that the minus side of a tantalum capacitor may be damaged by heat Precautions for Laser Diode Emission Check When checking the emission of the laser diode during adjust ments never view directly downwards as this may lead to blindness Precautions for Using Optical Pick up LCX ...

Page 3: ...5 5 3 1 How to Reset NV 15 5 4 Manual Power Adjustments 15 5 4 1 Adjustment sequence 15 5 4 2 Vc PWM Duty L Adjustment Method 15 5 4 3 Vrem PWM Duty L Adjustment Method 15 5 4 4 Vc PWM Duty H Adjustment Method 16 5 4 5 Vrem PWM Duty H Adjustment Method 16 5 5 Overall Adjustment Mode 16 5 5 1 Overall Adjustment Mode Structure 16 5 5 2 Overall CD and MO adjustment Method 16 5 5 3 Overall CD and MO a...

Page 4: ...he hook of the OPEN CLOSE switch SW board S809 with tape 2 This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM Therefore when EEPROM SYSTEM board IC802 has been replaced in service be sure to perform automatic adjustment and write resultant values to the new EEPROM Refer to section 5 Test Mode page 11 for details SECTION 1 SERVICING NOTE SW board ...

Page 5: ... 5 SECTION 2 GENERAL This section is extracted from instruction manual ...

Page 6: ... 6 ...

Page 7: ... UPPER 3 2 HOLDER ASSY Note Follow the disassembly procedure in the numerical order given Set Lid Assy Upper Holder Assy Mechanism Deck Plate L Assy Fulcrum Plate R Assy Fulcrum System Board Service Assy OP SW Board Main Board 1 2 3 screw 1 7 MI 4 screw 1 7 MI 5 lid assy upper 1 shaft 2 shaft 3 holder assy ...

Page 8: ... 8 3 3 MECHANISM DECK 3 4 SYSTEM BOARD 7 mechanism deck 5 connector 6 CN551 claw 1 screw step 2 3 4 1 CN601 2 SYSTEM board ...

Page 9: ...en installing fit the knob OPEN Note When installing fit the knobs HOLD MB AVLS 3 plate L assy fulcrum 6 plate R assy fulcrum 7 knob open 1 screw 1 7 MI 2 screw 1 7 MI 4 M 1 4 5 M 1 4 9 MAIN board 5 CN802 6 SW board 8 case battery 7 removal the solders 2 lid battery case claw 1 3 4 ...

Page 10: ... 10 3 7 SERVICE ASSY OP 4 M 1 4 3 M 1 4 1 washer 2 gear SA 5 service assy OP ...

Page 11: ...ING THE TEST MODE 4 2 1 How to set the TEST MODE To set the TEST MODE two methods are available 1 Solder bridge and short BP801 TEST on the system board Then turn on the power 2 In the normal mode operate the keys on the set and those on the remote control as specified below Turn on HOLD switch on the set Holding down x STOP key on the set press the keys on the remote control in the following sequ...

Page 12: ...e function The Manual mode is designed to perform adjustments and operational checks on the set s operation according to each individual function Usually no adjustments are made in this mode However the Manual mode is used to clear the memory before performing automatic adjustments in the OverallAdjustment mode 4 4 2 How to set the Manual mode 1 Set the TEST MODE and press key to set the Manual mo...

Page 13: ...e second error from the last one N 2 1 Displays 00 N 2 2 REC Total recording time 0000 is displayed for MZ E90 Description of the error display codes Contents of fault Display code Meaning of code Description No error 00 No error 01 Access target address illegally specified An attempt to access an abnormal address Servo system error 02 HIGH TEMP HIGH TEMP 03 FOCUS ERROR Focus off center 04 SPINDLE...

Page 14: ... name display Example When N key on the set is pressed LCD display Example When N key on the remote control is pressed LCD display XX AD value of the remote control key hexadecimal 00 to FF 3 When all the keys on the set and on the remote control are con sidered as OK the following displays are shown for 2 sec The key pressed to enter the Key Check mode has been checked even if it is not pressed i...

Page 15: ... 4 Press X key on the remote control again LCD display 5 Press x key to terminate the Manual mode and return to the TEST MODE 5 4 MANUAL POWER ADJUSTMENTS 5 4 1 Adjustment sequence The adjustments should be always performed in the following se quence 1 Vc PWM Duty L adjustment item No 762 r 2 Vrem PWN duty L adjustment item No 764 r 3 Vc PWM duty H adjustment item No 765 r 4 Vrem PWM Duty H adjust...

Page 16: ...equence of CD t MD adjustments 5 5 2 Overall CD and MO adjustment method 1 Set the TEST MODE see page 11 and press key to set the Overall Adjustment mode LCD display 2 Insert CD disc in the set and press key to set the Overall CD Adjustment mode Automatic adjustments are made LCD display XXX Item No for which an adjustment is being executed 3 If NG in the overall CD adjustments return to Reset NV ...

Page 17: ...D level adjustment 344 CD focus gain adjustment 345 CD tracking gain adjustment 521 CD two axis sensitivity adjustment 522 341 CD focus bias adjustment 2 Overall MO adjustment items Item No Contents 112 113 MO electrical offset adjustment 114 118 221 Low reflective CD TE gain adjustment 223 Low reflective CD TE offset adjustment 232 236 Low reflective CD ABCD level adjustment 244 Low reflective CD...

Page 18: ...tor signal input output 27 32 NC Not used Open 33 LD ON O Not used 34 NC I Not used Fix to VDD 35 SLD MON1 I SLED monitor signal input 36 PD S0 O PD IC mode select signal output 37 REG CTL CLK O Not used 38 PD S1 O PD IC mode select signal output 39 FFCLR O Start signal input latch output 40 SLEEP O SLEEP signal output 41 NC I Not used Fix to ground 42 NC Not used Open 43 XRST I Reset signal input...

Page 19: ...80 VB MON I UNREG power voltage monitor input 81 NC Not used Fix to L 82 VREF MON I CLEA reference voltage monitor signal input 83 WK DET I KEY WAKE detect signal input 84 OPEN CLOSE SW I OPEN SW detect signal input 85 RMC KEY I Remote control key detect signal input 86 SET KEY1 I This set key detect 1 signal input 87 DBB SW I DBB SW detect signal input 88 NC I Not used Fix to H 89 VRM MON I VREM ...

Page 20: ...RV O Reset signal output L Reset 113 114 NC Not used Open 115 XAVLS I AVLS SW detect signal input L ON 116 NC Not used Open 117 MUTE O Analog mute signal output H MUTE 118 NC Not used Open 119 XCS NV O EEPROM chip select signal output 120 NC Not used Open ...

Page 21: ...K LD A MON D C B A Jy Jx Ix Iy D D C PD I PD O DVDD AVCC C B A VREF VREF A C Jy Jx Ix Iy S1 RF AMP FOCUS ERROR TRACKING ERROR TPP WPP APC AVCC AVCC RF OUT PEAK BOTM ABCD FE ADIP IN TE ADIP PD NI OFTRK VC AOUT L AOUT R AVD1 AVD2 VDD RAM MNT3 VDD RAM SWDT SCLK XLAT SRDT SENS SQSY XINT TST3 CS DSP VDI00 VDI01 VDI02 VDI03 SBUS SCK S MON XRST PEAK BOTM RFI DIGITAL SIGNAL PROCESSOR DIGITAL SERVO SIGNAL ...

Page 22: ... PWM SYSTEM CONTROL SECTION SPINDLE MOTOR SWITCH IC504 FOCUS TRACKING COIL DRIVE SPINDLES SLED MOTOR DRIVE IC551 SLED VOLTAGE MONITOR IC552 7 1 3 6 5 2 128 129 SPINDLE MOTOR SWITCH IC505 7 1 3 6 21 27 30 26 28 32 23 DIGITAL SIGNAL PROCESSOR DIGITAL SERVO SIGNAL PROCESSOR EFM ACIRC ENCODER DECODER SHOCK PROOF MEMORY CONTROLLER 16M BIT D RAM IC601 2 2 SLCV VDC0 VREG VLD VDC1 VDC2 VDC3 VDC4 VDC5 DAVD...

Page 23: ...AVCC UNREG OPEN CLOSE 6 12 4 47 36 15 34 46 49 50 10 39 37 20 9 18 14 24 22 38 39 22 24 20 23 43 33 38 32 45 15 SLEEP 36 FFCLR 37 40 VC 30 1 OPEN CLOSE XWK1 SET KEY AVLS DBB1 DBB OPR LED HOLD SW 2 3 4 5 6 7 8 9 8 7 6 5 4 3 2 31 25 45 17 43 19 44 41 13 29 11 35 40 48 16 33 42 21 27 30 26 28 32 23 04 21 1 20 13 4 24 23 15 18 17 BEEP STB MUTE BEEP OUT A BEEP OUT A OUT B RCH RCH L OUT R OUT IN B B VCC...

Page 24: ...P827 TP565 TP558 TP552 TP560 TP809P808 TP807 TP804 TP906 TP907 TP803 TP805 TP802 TP801 TP515 TP516 TP905 TP909 TP502 TP570 TP569 1 675 486 11 11 1 A B C D E F G H I J 2 3 4 5 6 7 8 9 10 11 12 13 14 Note Y parts extracted from the conductor side f internal component b Pattern from the side which enables seeing The other layer s patterns are not indicated Caution Pattern face side Parts on the patte...

Page 25: ...01 C606 R609 R504 C610 C609 R604 C608 C603 R205 R105 C601 C104 C204 C351 C553 R941 C906 R910 R908 R942 R921 R922 C918 C917 R937 Q901 MINIDISC OPTICAL PICK UP BLOCK LCX 2E Q902 R909 D901 D903 R628 R936 R940 C915 C916 R918 C951 04 11 C953 L501 C518 C556 C555 C554 C954 D351 D101 D201 R939 R920 C952 L554 R943 R907 R905 R904 C905 R903 R902 R938 D902 TP903 TP952 TP528 TP201 TP101 TP202 TP608 TP102 50 45...

Page 26: ... specified A B Line Power voltage is dc 1 5 V and fed with regulated dc power supply from battery terminal Voltage and waveforms are dc with respect to ground under no signal conditions no mark PB Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations m...

Page 27: ...terminal Voltage and waveforms are dc with respect to ground under no signal conditions no mark PB Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled numbers refer to waveforms IC601 is not r...

Page 28: ...s and tantalums All resistors are in Ω and 1 4 W or less unless otherwise specified indicates tolerance A B Line Power voltage is dc 1 5 V and fed with regulated dc power supply from battery terminal Voltage is dc with respect to ground under no signal condition no mark PB Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc...

Page 29: ...s All resistors are in Ω and 1 4 W or less unless otherwise specified indicates tolerance A B Line Total current is measured with minidisc installed Power voltage is dc 1 5 V and fed with regulated dc power supply from battery terminal Voltage is dc with respect to ground under no signal condition no mark PB Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variatio...

Page 30: ... 115 112 98 97 96 88 86 83 89 85 84 82 79 73 69 64 52 49 46 43 45 40 37 38 35 39 36 33 26 25 24 19 12 9 8 6 2 58 60 55 68 65 67 66 11 11 11 11 R823 Page 30 IC301 H 4 IC801 G 8 IC802 G 10 Q301 I 3 Semiconductor Location Ref No Location Note f internal component b Pattern from the side which enables seeing The other layer s patterns are not indicated Caution Pattern face side Parts on the pattern fa...

Page 31: ... regulated dc power supply from battery terminal Voltage and waveforms are dc with respect to ground under no signal conditions no mark PB Impossible to measure Voltages are taken with a VOM Input impedance 10 MΩ Voltage variations may be noted due to normal produc tion tolerances Waveforms are taken with a oscilloscope Voltage variations may be noted due to normal produc tion tolerances Circled n...

Page 32: ...DIGITAL MEGABASS S809 OPEN CLOSE S808 HOLD MAIN BOARD CN802 2 11 11 11 ON x N 1 A B C D E 2 3 4 5 6 7 8 9 10 11 12 13 Page 30 6 3 8 PRINTED WIRING BOARD SW BOARD Note b Pattern from the side which enables seeing The other layer s patterns are not indicated Caution Pattern face side Parts on the pattern face side seen from the Side B pattern face are indicated Parts face side Parts on the parts fac...

Page 33: ...Page 34 Note All capacitors are in µF unless otherwise noted pF µµF 50 WV or less are not indicated except for electrolytics and tantalums All resistors are in Ω and 1 4 W or less unless otherwise specified indicates tolerance C panel designation ...

Page 34: ... D C Iy Ix Jx Jy A A C B ADIP FE ABCD AVCC OFC 1 OFC 2 PS LP EQ AGND RFOUT CCSL2 VC XRST SCK SBUS VREF075 PEAK BOTM DGND OFTRK S MON TON C CIG CDN ADIP DVDD PD I PD NI PD O 43 44 TWpp PK BTM Aw CSLO VREF075 A C D C Malfa Mij AwBPF Dw DwBPF 42 38 37 36 35 34 31 30 29 28 27 26 25 24 23 39 41 40 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A B C D I J NPP TON CSL Aw Dw TON Peak TON Botm ADI...

Page 35: ... 41 42 43 8 1 VI RO1 PGND1 FO1 VM12 RO2 PGND2 FO2 RI2 FI2 RI1 FI1 OE VC GND VG FI3 RI3 FI4 RI4 PWM24 FO4 VM4 PGND4 RO4 VM34 FO3 PGND3 RO3 VM3 COM CPWI CPVI PGNDW WO VMVW VO PGNDUV UO WI VMU CPUI COWO COVO COUO VC VC VC VG VC VG VC VC VG VC VC VG VC VC VG VC VC VG VM2 VM1 UI PWM1 2 3 48 45 23 22 21 20 19 17 18 14 13 BIAS PRE DRIVER HI BRIDGE CONTROL PRE DRIVER PRE DRIVER HI BRIDGE CONTROL 3 PHASE C...

Page 36: ...FFCLR VC VB VC VG VG VC VC VR XWK1 XWK2 XWK3 XWK4 VCIN VC L1 PGND L2 VROUT VCON VC DCIN VB VREG RF4 DCIN DCIN CHGMON CHGB VREF 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 38 39 40 41 42 43 44 45 46 47 48 1 2 3 4 5 6 7 8 9 10 11 12 STEP UP DC DC CONVERTER SAW OSC2 SYSTEM CONTROL STEP UP PRE DRIVER STEP UP PRE DRIVER PWM PWM BANDGAP REFERENCE IC901 MPC18A31FTA ...

Page 37: ... UPPER W WHITE WHITE 12 X 3378 310 1 LID ASSY UPPER R RED RED 13 4 214 627 01 SPACER BATTERY TERMINAL 14 4 218 233 05 SCREW 1 7 MI 15 X 4952 175 1 PLATE L ASSY FULCRUM 16 4 223 906 01 SCREW STEP 17 X 4952 178 1 BRACKET STOP ASSY 18 X 4952 177 1 PLATE R ASSY FULCRUM 19 4 223 907 01 LID BATTERY CASE SILVER SILVER 19 4 223 907 11 LID BATTERY CASE WHITE WHITE 19 4 223 907 21 LID BATTERY CASE RED RED 2...

Page 38: ... 5 57 4 963 883 31 SCREW M1 4 PRECISION PAN 58 3 349 825 21 SCREW 59 4 222 208 01 GEAR SB 60 3 043 237 01 BEARING N 61 4 222 203 01 SCREW LEAD 062 X 4952 387 1 SERVICE ASSY OP LCX 2E 63 4 222 205 01 SPRING RACK M901 8 835 666 01 MOTOR DC SSM 01C14A C NP SPINDLE M902 1 763 399 11 MOTOR DC SLED WITH PULLEY GEAR A A 51 52 53 M901 M902 54 55 56 57 59 61 62 57 63 60 60 58 57 57 The components identifie...

Page 39: ... 16V C554 1 107 765 11 TANTAL CHIP 3 3uF 20 16V C555 1 135 238 21 TANTAL CHIP 6 8uF 20 10V C556 1 135 238 21 TANTAL CHIP 6 8uF 20 10V C557 1 127 772 11 CERAMIC CHIP 0 033uF 10 10V C558 1 127 772 11 CERAMIC CHIP 0 033uF 10 10V C559 1 127 772 11 CERAMIC CHIP 0 033uF 10 10V C561 1 164 156 11 CERAMIC CHIP 0 1uF 25V C601 1 107 820 11 CERAMIC CHIP 0 1uF 16V C603 1 107 820 11 CERAMIC CHIP 0 1uF 16V C605 ...

Page 40: ...0K 5 1 16W R552 1 218 965 11 RES CHIP 10K 5 1 16W R553 1 218 965 11 RES CHIP 10K 5 1 16W R554 1 218 965 11 RES CHIP 10K 5 1 16W R555 1 218 965 11 RES CHIP 10K 5 1 16W R556 1 216 864 11 METAL CHIP 0 5 1 16W R601 1 218 929 11 RES CHIP 10 5 1 16W R602 1 218 929 11 RES CHIP 10 5 1 16W R603 1 216 811 11 METAL CHIP 150 5 1 16W R604 1 218 973 11 RES CHIP 47K 5 1 16W R605 1 218 965 11 RES CHIP 10K 5 1 16W...

Page 41: ...6 1 117 919 11 TANTAL CHIP 10uF 20 6 3V C802 1 107 820 11 CERAMIC CHIP 0 1uF 16V C803 1 164 935 11 CERAMIC CHIP 470PF 10 16V C804 1 164 943 11 CERAMIC CHIP 0 01uF 10 16V C806 1 125 891 11 CERAMIC CHIP 0 47uF 10 10V C807 1 125 891 11 CERAMIC CHIP 0 47uF 10 10V C808 1 107 820 11 CERAMIC CHIP 0 1uF 16V C809 1 107 820 11 CERAMIC CHIP 0 1uF 16V C811 1 107 820 11 CERAMIC CHIP 0 1uF 16V CONNECTOR CN803 1...

Page 42: ...RY CHARGER BC 9HP2 HK 1 528 918 11 BATTERY CASE 0 1 569 007 11 ADAPTOR CONVERSION 2P JE 1 756 036 11 BATTERY NICKEL HYDROGEN NH 14WM 3 043 060 01 CASE CHARGE C D 3 868 188 11 MANUAL INSTRUCTION SPANISH TRADITIONAL CHINESE 3 868 188 21 MANUAL INSTRUCTION ENGLISH FRENCH 3 868 188 71 MANUAL INSTRUCTION JAPANESE KOREAN JE 4 221 117 01 CASE CARRYING 8 953 304 90 RECEIVER MDR E805SP Sony Corporation Per...

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